Lock



M. HACKLANDER.

LOCK.

APPLICATION FILED NOV-8,1920

Patented Feb. 21; 1922.

jzeafeizlar" a M UNHEEE) "STA r cranes.-

' aux HAcKLANDER, or NEVIGES, GERMANY.

LOCK.

Application filed. November 8, 1920. Serial H0.1422,686.

a means for engaging with the teeth of de-I tents arranged to detain the bolt, independently from the particular number of notches by which each tumbler is shifted. V

A constructional form of the invention in theshape of a padlock is illustrated in the drawing in which .Fig. 1 shows the lock with the internal guard mechanism removed and the arcuate knuckle closed.

Fig. 2 is a similar View with the knuckle opened. v

Fig. 3 represents the lock furnished with a tumbler plate and a detent, and with the knuckle locked by the bolt.

Fig. 4c shows a similar view to Fig. 3 but with the knuckle unlocked.

The bolt a, which slides on three pins 6 fixed to the lock case, is furnished at its rear end with two pins 0, on which the tumbler plates d are guided in a straight line by two slots '6. Two other rectangular pins f project from the opposite end of the bolt, and the distance between these pins f is equal to the length of the detents g, which are so guided by a slot h and a pair of pins 7) at the left of the look as to move only in a direction that is parallel to the direction in which the tumblers d may be shifted on their pins 0. In the case illustrated the detents g (for there may be a plurality of them) are provided with a pair of teeth k. As long as the arcuate knuckle is unlocked by the bolt a, all of the detents g are situated in uniform positions between the pins 7" as shown in Fig. 4:.

At their free ends the tumblers d are furnished with teeth i arranged as on a comb, the size, spacing, and direction of these teeth being such that the pairrof teeth is of each detent g may engage with the comb of its 7 Specificationof Letters Eatent. Patented Feb, 21, 1922,

associated tumbler when the latter is brought i into an appropriate position. This positioningof the tumblers is effected by the key i when closing the lock, the steps of the 'bit of the key being of such heights'that they shift the tumblers by l, 2, 3 or more notches,

the number of notches by which'each tumbler is raised being'immaterial. Nor does it matter which of the tumblers isshifted by the larger, and which by the smaller, number of notches. When the operationof shifting the tumblers is concluded, their positions will be such. that the pair of teeth Z: of each detent 9 will register with a pair of gaps or notches in the comb of its associated tumbler d. On the ,key now being turned further around, the bolt 0, is shifted and thus the combs 2' are caused to mesh with the pair of teeth When the bolt hasbeen shifted go, see Fig. 3. The bolt a is now locked.

When the lock is opened by the key and the tumblers d are lifted in a straight line by the key bit, the detents 9, whose teeth are in mesh with the combs of the tumblers,

will be shifted in the same direction and to the same extent as the tumblers themselves,

and they will be brought into a position in which their upper and lower edges line up with the inner edges of thepins f. When this condition is attained the tumblers cease and the slot h in the detents will let them being effected by the key and the key-bit I edgs of the detents and finally keep them in position. As soon as the combs of the tum blers d are disengaged from theteeth of the detents, the tumblers are pushed down on the pins 0 by their springs and are thus restored to the position shown in Fig. 4.

It will be obvious the above described lock can be closed with keys of the most various kinds, since the only condition to be satisfied is that the individual steps of the keybit shall shift the respective tumblers by 1,

2, 3 or more notches, Whilst the particular number of notches by which each tumbler is shifted is of no consequence.

But the lock can only be opened by the keythat was used to close it; for when the lock is closed the-various tumblers assume the vertical positions imparted to them by the steps of the key-bit, and therefore different notches of their combs will be brought into engagement with the pairs of teeth on the detents so that these latter can only be brought into their previous positions, which permit of the return motion of the bolt (4, by the same key that was used to close the lock.

If a suitable number oi? tumblers and a certain numberot teeth on their combs is used, hundreds of different keys may be adaptedto a lock having tumblers that are all of precisely the same pattern, and detents and wards that are also all perfectly similar.

I claim: 7

1. In a look with tumblers adapted to assume positions imparted to them by the steps of the bit of the key used, a case, a movable bolt, a toothed tumbler adapted to shift on the said bolt in a straight line, and a toothed detent adapted to shift on the said case in a direction parallel to the direction of movement of the tumbler, the teeth of the detent being adapted to engage with the teeth of the tumbler when bolt is in its when it is moved forward and for releasing the bolt when the tumbler is shitted into an appropriate position with respect to the teeth of the detent. I r

3. In a lock with tumblers adapted to assume positions imparted to them by the steps of the bit ot the key used, a case, a movable bolt, a toothed tumbler adaptedtoshifton the said bolt in a straight line, a'toothed (lQt-BnlLfOl detaining the said bolt when it moved forward and for releasing the bolt when the tumbler is shifted into an appropriate position] with respect to the teeth of the detent, and holding members onthe bolt for holding the detent iii-position when the MAX HACKLANDER. 

